Merchant DBA: "doing business as" name as set in the merchant account
Charge descriptor: text identifying the charge on the card holder statement
Normally the charge descriptor is set as the merchant DBA.
These are too often overlooked when in fact they are critical for your operations.
If the charge descriptor does not clearly identify your business the card holders will not recognize the charge and will most likely dispute it with her/his card Issuer . This will result in a charge back and more importantly result in more work for you as you will need to response to all disputes.
Make sure your DBA and charge descriptor match the business name that the card holder knows. For online purchases for example make sure that the DBA and charge descriptor match the name of the website from which the order is placed.